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Finding the Fourth Proportional to 391,003, 586,510.28 and 95,515

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Solution

The fourth proportional to 391,003, 586,510.28 and 95,515 is: 143,273.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,003 : 586,510.28 = 95,515 : x
  2. Step 2: Convert to fraction form
    391,003/586,510.28 = 95,515/x
  3. Step 3: Cross multiply
    391,003x = 586,510.28 × 95,515
  4. Step 4: Simplify right side
    391,003x = 56,020,529,394.20
  5. Step 5: Solve for x
    x = 56,020,529,394.20/391,003
  6. Step 6: Final answer
    x = 143,273.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.